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replacing footage in a comp with alt frame rate footage?

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Moog Gravett
replacing footage in a comp with alt frame rate footage?
on Jun 25, 2013 at 1:49:41 pm

Hello chaps,

I have a situation where I have created and worked on a comp (running at 23.974fps) in which I accidentally imported an image sequence at 30fps before working on it. In fact I've done a few of these, so I'm hoping that there's a way i can use all my original keyframe data (mesh warps, and translation) on some footage imported at the correct rate of 23.974, rather that re-do all the leg work.

any ideas?

cheers

Moog

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http://www.Peculiana.com
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mathew fuller
Re: replacing footage in a comp with alt frame rate footage?
on Jun 25, 2013 at 2:49:20 pm

Go to the sequence in ur project bin. Rt Click. Choose "interperate footage". Change the frame rate to 23.976.

Done.

My Work:
http://www.morecompletefx.com


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Moog Gravett
Re: replacing footage in a comp with alt frame rate footage?
on Jun 25, 2013 at 2:51:49 pm

Hi Matthew,

cheers for the idea, however, I've tried that already, but what happens is the keyframes I've placed align with different points in the video.

any other thoughts are most welcome.

+++++++++++
Freelance | Video Editor | After Effects | Camerawork

http://www.Peculiana.com
+++++++++++


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Dave LaRonde
Re: replacing footage in a comp with alt frame rate footage?
on Jun 25, 2013 at 3:29:44 pm

Yup, that'll happen: a different frame rate means different timing. You'll have to move those keyframes, but that shouldn't be too tough to do.

Since the footage also runs a bit longer, you might have to readjust its out point, too. Again, not a big deal.

Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Moog Gravett
Re: replacing footage in a comp with alt frame rate footage?
on Jun 25, 2013 at 3:40:28 pm

Cheers for the heads up Dave, I thought as much too, the trouble is I'm creating looping videos of people, so all my keyframes are really precise so I can't very easily identify matching frames between rates. Also, the keyframes may have many keyframes in a 10 frame range (for example) so I wonder how to scale those as one unit but keep that in ratio with the footage.

Do you happen to know a mathematical solution at all?

+++++++++++
Freelance | Video Editor | After Effects | Camerawork

http://www.Peculiana.com
+++++++++++


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mathew fuller
Re: replacing footage in a comp with alt frame rate footage?
on Jun 25, 2013 at 4:12:41 pm

Unless someone knows of a script. There is no way to be precise. You can stretch your keyframes as a whole but it will never line up exact and some keyframes will land between actual frames in the timeline. You will spend more time messing with a way to do it in an automated fashion in my opinion. So just bite the bullet and do it by hand. Ive made mistakes like this when I was starting out and I still get busy and make them today occasionally. Lesson learned, and you wont do it again I bet.

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Moog Gravett
Re: replacing footage in a comp with alt frame rate footage?
on Jun 25, 2013 at 4:21:42 pm

Thanks mate,

yeah, I've pretty much come to the conclusion that it's learning the hard way.

thanks to all for input

moog

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Freelance | Video Editor | After Effects | Camerawork

http://www.Peculiana.com
+++++++++++


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Dave LaRonde
Re: replacing footage in a comp with alt frame rate footage?
on Jun 25, 2013 at 5:10:32 pm

[Moog Gravett] "Do you happen to know a mathematical solution at all?"

Well, there IS the ratio between the two rates: 23.976 vs. 30. According to my calculator, each frame of the slower frame rate is 1.00125125125125125125125125125125... longer than faster frame rate. Messy. Ugh.

I guess that leaves you with moving keyframes around for the kind of precision you seek. Hey, look at it this way: this is a mistake people seldom make twice, because fixing the mistake is... well, painful.

Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Moog Gravett
Re: replacing footage in a comp with alt frame rate footage?
on Jun 26, 2013 at 8:55:04 am

Thanks again for all input. Definitely looks like a case of hard lesson learned. :(

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Freelance | Video Editor | After Effects | Camerawork

http://www.Peculiana.com
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Walter Soyka
Re: replacing footage in a comp with alt frame rate footage?
on Jun 25, 2013 at 4:29:37 pm

[Moog Gravett] "I have a situation where I have created and worked on a comp (running at 23.974fps) in which I accidentally imported an image sequence at 30fps before working on it."

You can select a group of keyframes and alt-drag the first or last one to adjust them proportionately in time. I'd make sure I had a keyframe on the first and last frames of the footage to make it easy to line up, then I'd re-interpret the footage at 23.976 and alt-drag all keyframes out to the new duration.

You could also precomp your image sequence, then use a time stretch (30/23.976 = 125.125125%) to correct it.

Be aware that you may have some improperly placed keyframes because of the mismatch between your viewing frame rate (the comp) and the footage frame rate. Ae would have dropped/duplicated frames to fit the 30>23.976 conversion if frame blending was off, or would have made up new frames if frame blending was on originally. Some noodling might be required, so I'd be inclined to go the alt-drag route to make it easier.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
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Doyle Lewis
Re: replacing footage in a comp with alt frame rate footage?
on Jun 26, 2013 at 2:09:40 pm

Hey I believe Andrew Kramer has a plug in for this exact situation. http://www.videocopilot.net/tutorial/frame_rate_converter/. It converts your frame rate to whatever you want it to be, but then adjusts the speed to the intended real time. Thank God for Andrew Kramer! Hope that helps.

Doyle Lewis, Assistant Videographer

thinkck.com


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Moog Gravett
Re: replacing footage in a comp with alt frame rate footage?
on Jun 26, 2013 at 3:02:20 pm

oooh - that's going to be worth a look. Cheers :)

+++++++++++
Freelance | Video Editor | After Effects | Camerawork

http://www.Peculiana.com
+++++++++++


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Walter Soyka
Re: replacing footage in a comp with alt frame rate footage?
on Jun 26, 2013 at 3:12:47 pm

Using any kind of frame rate conversion will mean synthesizing new frames and probably creating some blobby visual artifacts. This is a great technique for dealing with footage in a foreign frame rate when you have no other choice, but I wouldn't recommend it as a first choice here, since all the original frames are already there.

The keyframe alt-drag technique I mentioned earlier should sort this out in a couple seconds.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
Creative Cow Forum Host: Live & Stage Events


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Doyle Lewis
Re: replacing footage in a comp with alt frame rate footage?
on Jun 28, 2013 at 1:32:09 pm

I agree Walter it can create some blobby artifacts but it does also have a series of sliders that allow you to tweek the synthesized frames till they look good (not perfect, but good). It is not perfect by any means, but it could be a good solution as a correction for a one time mistake.

Doyle Lewis, Assistant Videographer

thinkck.com


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